1. Pacific Ecological Systems Division, US Environmental Protection Agency, Newport, OR 97365, USA
2. Gulf Ecosystem Measurement and Modeling Division, US Environmental Protection Agency, Gulf Breeze, FL 32561, USA
3. Contractor to US Environmental Protection Agency, Cincinnati, OH 45268, USA
4. Region 2 Superfund and Emergency Management Division, US Environmental Protection Agency, New York, NY 10007, USA
5. Watershed and Ecosystem Characterization Division, US Environmental Protection Agency, Cincinnati, OH 45268, USA